Just another option for those who are not rooting.. I have a Kingston 64GB wi drive that I had for my phone that holds all my video's, photos, and some back up documents. This works great on the nexus 7 too. Battery life if 4 hrs on average. But if I'm in a location where I have power I plug it in for unlimited use. Your supposed to have online access to your files too but I haven't figured that out yet. Just another option.